I NEED HELP ASAP !! What did the mason and dixon line have in common with the Underground Railroad

Explanation:

The Mason-Dixon line was essentially one of the most used underground 'lines' of railroad to transport slaves to freedom. It was a railroad that, although not important before, became incredibly important over time as it was an essential 'Forgotten' railroad in a way, that was not only able to transport slaves, but had tracks directly into and through both free and slave states.

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ba geologist finds four sedimentary rock she determines that no geologic events have shifted the layers she labeles them a,b,c,dbfrom top to bottom

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